Sonar Platinum Freezing

When I load a project everything is fine but after 2 minutes everything freezes, it appears that cpu 10 is 100% at that is what Sonar is using despite the use multi-core box ticked in preferences.
As soon as Sonar is killed cpu 10 goes back to zero. its a 6 core PC with 12 threads, 64GB RAM, i7 processor running Windows 10.
Anybody got any ideas?

There should be no issues as my backup PC has exactly the same hardware config just less memory and a less powerful i7 processor and Sonar works fine.
But I placed a support call with Dell they updated the BIOS and it's now running sweet as a nut across the cores. Bit suspicious as it's the 1st thing they tried so might have been a known issue......
Of course now the creative spark has passed...................................

I have loaded a more complex project and it almost immediately freezes, but if I select close window for Sonar from windows it appears to momentarily in-freeze, BUT nothing is now playing at all and yet SPLAT is showing a cpu usage of 20% what is it doing?
This looks wrong and maybe the reason I am having issues something is running in the background on SPLAT anybody got any ideas?

Have analysed the threads and there are a whole load of these running.
ucrtbasedll!o realloc base+&K20 all at around 0.7% which when totalled up takes up 17% of cpu? The rest a pretty small and are plugins at around 0.01% or so the rest are the remaining plugins at <0.01%.
 
So the question what are these ucrtbasedll!o realloc base+&K20?
 

Hello,
In your audio.ini file :
  
ThreadSchedulingModel=<0 - 2> 
Type Integer 
Default 1  
 
Change this setting to 2 if it is not.
 
Also is this windows 7 or 10.. If 10 see this link. :
https://support.focusrite.com/hc/en-gb/articles/207355205-Optimising-your-PC-for-Audio-on-Windows-10
 
It was very helpful for my new build  Thanks
 

ucrtbase.dll is part of the C runtime library, which in turn is part of Windows. I wouldn't be surprised if the problem ultimately turns out to be a plugin that doesn't play well with load balancing.

Thanks plug-ins may be the underlying issue as I loaded just my template and that was running at 19% CPU. As this is the replacement PC for the one that went into meltdown there might be some plug-ins that have yet to be activated  so have started walking through each one and checking. At least while working on template I have room to manoeuvre there were some that caused issues previously but those were not installed initially.
I would suspect the PC but it runs high performance games without raising a sweat.
 
For info.
Windows 10 64 bit (one build behind latest), i7-68000K 3.4GHZ CPU(4.0GHz overclocked) 6 core 12 logical processors
64GB RAM, Dual GTX-1080 graphics, ZxR DB Pro soundcard. 1.4TB of SSD and 6TB of SATA.
 
The backup PC is a Windows 10 64 bit latest build a less powerful i7 3.4GHz 6 cores core 12 logical processors, 32GB RAM single less powerful GTX graphics card and same soundcard, and 1,256GB of SSD and 4TB of SATA.
More plugin-ins on backup (the troublesome ones) and all external hardware midi keyboards, console 1 and mixers etc.can be connected to either.

Done further testing and SPLAT is happily playing my midi instrument sounds are coming out etc. , but the screen is frozen. There is plenty of CPU even in the processor SPLAT is running in so it starting to look like an incompatibility with the NVidia Dual GTX-1080 graphics card, at least there is no other common denominator between the 2 replacement PC's. Anyone using same graphics cards? 

Trouble is this is happening on a basic template with one instrument. But there are reported issues to do with stuttering occurring on the video card so will raise a support ticket with NVidia.

If you're basing your CPU percentage on SONAR's CPU meter, that's misleading. It doesn't really display how much CPU SONAR is using, but rather how long it takes SONAR to fill the audio buffers. It's still a useful indicator of how close you are to maxing out your CPU, but it's a number that can be affected by other things that are going on in the system.
 
So no, you're not in the Twilight Zone. The White House Science Committee is still a roomful of empty chairs.

Do you use Lasso's load balancing features, or are you just using it as a process monitor?

Just a (perhaps unrelated) thought...once upon a time, back when I was running a 2-core Pentium and often pushing it to its limits, I was in the habit of boosting SONAR's priority. But then Noel posted an opinion suggesting that MMCSS made this unnecessary and that it could even be detrimental. Noel is quite the expert when it comes to CPU optimization under Windows, having put a lot of work into mostly-invisible tweaks such as priority inversion detection and thread balancing, so I trust his advice.

If this is a system you put together I hope you did the typical burn-in/memory/hw level tests before putting it into production.  
We had a user with some random troubles that came down to bad memory.  Memory tests failed and it was a very powerful system but with off brand RAM.
 
Keith

Latest update from NVIDIA:
Please change the following settings in the NVIDIA Control Panel Global Settings under "Manage 3D Settings”:
• Change the 'Power Management Mode' to 'Prefer Maximum Performance'.
Also try changing the below mentioned settings
- Please try changing the performance mode of all the applications. Below are the instructions for the same.
- Open NVIDIA Control Panel --> Manage 3D settings.
- Go to Program Settings tab.
- Add the .exe file of each application by clicking on Add button.
- In the setting window, change the 'Power Management Mode' to 'Prefer Maximum Performance'.
- Click on Save and restart the Computer.
- Run the program and check.

I have now run a series of identical tests on the SPLAT over a period of time. Each time SPLAT is closed after 15 minutes and changes not saved.
PC on for less than an hour no issues.
2 hours later observing the odd stutter in the graphics.
1 hour later significant delays occur up to 3 minutes to respond to a click on screen, then a period of no freezing and then freezing again. Now impossible to drag objects on screen.
1 hour later only managed to get the app to start playback of a track before complete graphics froze, track still playing. In fact only way out was to terminate SPLAT from task manager.
In all the above there was spare cpu on all processors (19 as 18 had affinity removed), no evidence of additional or forced paging, Total RAM around 10%  SPLAT holding around 7.5GB committed memory. SPLAT under the hood graphics appeared still to be working as expected. i.e Track still playing quite happily
As this is definitely not a SONAR issue so now having to fail over to back-up PC which means as keyboards are 6 feet away an issue but thanks to Craig’s article have purchased a Dragonfly to assist in recording etc.
If I ever get a resolution will update thread again